Official NHA Assessment

Race 6: TAB 4RACING APP CLASSIFIED STAKES (For horses with nett rating of 71 and below)

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Line Horse
Africa's Rock
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
5 / 12
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Sirnihaallongsword   4    58.0    1    0.00     4.5   67    64           64    -3
2    Gunsmoke             3    60.0    2    1.00     7.0   69    67           67    -2
3    Africa's Rock        4    60.0    3    1.50     4.5   71    71           71    +0
4    Kuznetsov            2    56.0    4    1.75     0.0   61    72           72    +11
5    Raising Quinn        3    58.0    5    1.80     7.0   69    62           62    -7
6    Downing Seven        5    58.0    6    2.30     0.0   66    75           75    +9
7    Travel Master        4    60.0    7    2.55     4.5   68    70           70    +2
8    Charlie Malone       5    56.0    8    3.80     0.0   61    70           70    +9
9    Arturo               2    56.0    9    7.30     0.0   74    69           69    -5
10   Woodland Ridge       2    58.0    10   12.05    0.0   68    73           73    +5
11   Emerald Flame        5    52.5    11   19.30    0.0   35    62           62    +27
99   Ilha Da Mauricia     3    58.0    99   0.00     7.0   -     59           59    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sirnihaallongsword 67 69 64 +5 4.5 -
2 Gunsmoke 69 68 67 +1 7.0 -
3 Africa's Rock Line 71 70 71 -1 4.5
4 Kuznetsov 61 61 72 -11 0.0 -
5 Raising Quinn 69 69 62 +7 7.0 -
6 Downing Seven 66 69 75 -6 0.0 -
7 Travel Master 68 65 70 -5 4.5 -
8 Charlie Malone 61 71 70 +1 0.0 -
9 Arturo 74 76 69 +7 0.0 -
10 Woodland Ridge 68 69 73 -4 0.0 -
11 Emerald Flame 35 35 62 -27 0.0 -
99 Ilha Da Mauricia - 63 59 +4 7.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points